burnt plant

Hi i this is my first auto grow and have bad nute burn but also looks like def what you think its 6week in coco using canna coco a and b nutes 1mill per litre and under 400w hps and 125w cfl temps are abit high 85f due to hot weather

85 isn't the end of the world

your plants look good

I don't see nute burn at all... magnesium def!!

id bump your nutes up to 8mls part A 8mls part B and 1 tsp Epsom salt per gallon

your under feeding them